Upgrade @nrwl/linter in nx/plugins/eslint

[joecowton1]

This is blocked as @nrwl/linter no longer exports schema, which is something we use in our custom executor. The custom executor wraps the standard one and hardcodes fix: true - maybe this is something we don't need? Or is there another way of doing it?

Either way we should be able to use @nrwl/linter 16 >